Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Electromagnetic Waves and Wave Optics/
Question 20203
JEE Physics · Easy

Electromagnetic Waves and Wave Optics: Constructive Interference Condition MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Constructive Interference ConditionEasyQuestion 20203

Question

Constructive interference occurs at a point when path difference Δ equals:
  1. A
    (2n+1)λ/2
  2. B
    nλ where n = 0, 1, 2...
    Correct
  3. C
    λ/4
  4. D
    (n+½)λ

Correct answer

nλ where n = 0, 1, 2...

Explanation

When path difference = nλ (whole number of wavelengths), crest meets crest → constructive interference → bright fringe. Phase difference = 2nπ.

Review Electromagnetic Waves and Wave Optics notesStart timed chapter practice